ANENG AC10 Socket Tester Plug Detector Zero Line Plug Polarity Phase Check Phase Detector US/EU Plug Multimeter Digital Tester Features: AC10 socket tester are mainly used to detect polarity of power socket and safety of leakage switch. It can quickly and accurately detect the wiring of the socket.Simuitaneously, it can test the socket voltage and show on the LED screen. Specifications: Work voltage2.6~3.3V Test voltage range90V~250V/500~60Hz Work temperature0 C~40 C Work humidity20%~75%RH Stock temperature-10C~50 C Stock humidity20%~80%RH 20%~80%RH20%~80%RH RCD work Current>30mA RCD work voltage220V20V Battery2*AAA Batterywithout batteries Package List: 1 * AC10 Socket tester( without batteries ) 1 * User Manual